@KubaCZ,
did you ever get around doing the Czech translation?
Ahh, I totally forgot - I have reinstalled Windows so I lost the progress, but now I have time again co I can write it from scratch again, will try to have it complete this week

I'm still learning with AVRs, so if something goes wrong I warned you, but I haven't bricked any AVR I tried yet
From programmer's name, it seems it's STK500 compatiable.
Is it registered as COM# port in your OS? If it is then you can use AVRdude to get firmware in there.
It should be something like:
Oh, and I forgot - get AVRdude from WinAVR package, which is free and you can find it on google in few secs

Or you can stack 2nd pokey on first one, but I'm not sure if it would fit in 600XL, as I don't have any (yet ).
I am not feelin the love for stacking them... especially considering small Gumby PCB's are pretty cheap...
w1k: no, 64k first, and if its NTSC, then AV mod...
sloopy.
Well for me it is the same thing as making holes in case. Also I'm lazy to etch such board and I don't want to buy something that can be done easier - I'm using sockets so second pokey can be reused without any problems

I haven't used it for few months, but if I remember correctly then it was really just resistors connected to pins 11,7 and 9? There is also simple sound generator included in the library.
About overlay, I have no clue too - hope somebody here knows.

That could be formidable. The Arduinos don't have video output themselves. However, there is the Gameduino shield: http://excamera.com/sphinx/gameduino/
Still, the Arduino runs this "display" by sending commands over SPI. Like a serial terminal.. Vaguely like the XEP80 "80 column" display that hooks up to the Atari's joystick port.
It would still be formidable. Somehow the video from the Gameduino shield has to be mixed with the Atari's.
There's actually very simple composite output library - it's called TVout, it's not really something impressive with color and hires graphics, but it's made out of 2 resistors
http://code.google.com/p/arduino-tvout/

This is reason why I don't play on C64/VIC20 too much - it's hard to get something there. I'm using 1541-II connected to P1 MMX machine with XE1541 cable and star commander. It's not really fast but it works - but you need 2 floppy drives and still it's not something like SIO2PC, but it's cheap
1541 ultimate II works as good or better -more options- than sio2sd
but its very expensive
Yeah, that's the problem - I've got C64 and 2 floppy drives donated so I don't want to spend much money on it - still preffer Ataris Also isn't there problem with demos/games/etc. with speedloaders? iirc if the drive isn't emualted in lowlevel then it doesn't work.

This is reason why I don't play on C64/VIC20 too much - it's hard to get something there. I'm using 1541-II connected to P1 MMX machine with XE1541 cable and star commander. It's not really fast but it works - but you need 2 floppy drives and still it's not something like SIO2PC, but it's cheap

http://www.atariage.com/forums/topic/197652-atari-proto-collection-1450xld-1400xl-1200-1090-xl-expansion/ 7 mins ago
I wonder for how much this will go - it's also interesting how the 1200 prototype has other surface than others, never seen that before.

I'm using Sony PVM-1442QM monitor, which I guess is studio monitor, I've got it donated with few other things so I don't know how hard is to find it... also Commodore 1084(S) etc. monitors are good
I hope you'll post results

Hi
I don't have any XE machine open right now, so I've looked into 800XL board and it says 104 too - that means it's 100nF cap.
I'm not really sure but if the RAMs are by MT then they are probably dead, are you getting some picture - red screen for example?
and yes, these caps will work